Did You Know What is a Virus? A virus is a small piece of software that piggybacks on real programs. An email virus travels as an attachment and usually replicates itself by automatically mailing itself to dozens of people in the victims e-mail address book. Regular monitoring and detection blocks and prevents a computer virus from activating. August 14, 2013/by Kate Rollins Kate Rollins Kate Rollins2013-08-14 20:18:562013-08-14 20:18:56What is a Virus?